The Tiananmen Incident took place on April 5, 1976 at Tiananmen Square in Beijing, China. The incident occurred on the traditional day of mourning, the Qingming Festival, after the Nanjing Incident, and was triggered by the death of Premier Zhou Enlai earlier that year. Some people strongly disapproved of the removal of the displays of mourning, and began gathering in the Square to protest against the central authorities, then largely under the auspices of the Gang of Four, who ordered the Square to be cleared.

The event was labeled as counterrevolutionary immediately after its occurrence by the Communist Party's Central Committee and served as a gateway to the dismissal and house arrest of then-Vice Premier Deng Xiaoping, who was accused of planning the event. The Central Committee's decision on the event was reversed after Deng came to power in 1978, as it would later be officially hailed as a display of patriotism.

Premier Zhou's most visible and powerful antagonists were the four senior members who came to be called the Gang of Four.[citation needed] The leader of the clique, Jiang Qing, was married to Communist Party Chairman Mao Zedong. To defuse an expected popular outpouring of sentiment at Zhou's death, the Communist Party of China limited the period of public mourning; for example, the national flag was lowered to half-mast for only one hour.[citation needed]

On April 4, for example, hundreds of thousands of Beijing residents came to the square to lay wreaths at the Monument. Hundreds of mourners posted handwritten poems there as well. Many of the poems seemed to refer to and commemorate ancient Chinese historical events, but most were intended to criticize China's current leaders. It was an indirect way of expression without compromising the possibility of arrest by security forces (see Jan Wong's account of these poems in Red China Blues). An example was a poem implicitly criticizing Jiang Qing by attacking the Empress Wu Zetian, a 7th-century Tang Dynasty empress who ruled after her husband died.

The large number of mourners and intensity of the public outpouring of sentiment alarmed government and Communist Party officials. The Politburo met in emergency sessions in the Great Hall of the People, which lies a few yards west of Tiananmen Square. The leaders decided to remove all the wreaths, flowers, and poems.

Public security forces acted during the night of April 4–5 and cleaned the area around the Monument. On April 5, tens of thousands of Beijing residents returned to the Monument in Tiananmen Square and were dismayed to find the wreaths and other commemorative materials removed. In addition, public security officers cordoned off the area around the Monument, preventing mourners from approaching.

China's leaders, namely Jiang Qing (Mao Zedong's wife) and Mao Yuanxin, saw the popular gathering as a threat to the forward movement of the Cultural Revolution. They consulted with Party Chairman Mao Zedong, claiming these people to be "capitalist roaders" who were hitting back at the Proletarian Revolution. Action was taken on the night of April 5, when the number of mourners were a few thousand. Controlled by Jiang Qing and the mayor of Beijing, the militia encircled the area, then went in with clubs and batons to drive the people away from the monument. Four thousand were arrested. According to Jan Wong in Red China Blues, around 60 were dragged into the Great Hall of the People, beheaded and secretly cremated.

The media subsequently linked the event to Deng Xiaoping, then carrying out the daily duties of the Premier. It was rumored that the Gang of Four had become apprehensive of Deng's influence and thus attempted his removal. Deng was an ally of Zhou Enlai, and was placed under house arrest in Guangzhou. After Mao's death and the fall of the Gang of Four in October 1976, Party leaders rehabilitated Deng and brought him back to Beijing, where he emerged as China's Paramount Leader in 1978.